US2022336897A1PendingUtilityA1

Rechargeable battery

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Assignee: SAMSUNG SDI CO LTDPriority: Jun 23, 2020Filed: Mar 9, 2021Published: Oct 20, 2022
Est. expiryJun 23, 2040(~13.9 yrs left)· nominal 20-yr term from priority
Inventors:Dae Kyu Kim
H01M 50/564H01M 50/172Y02P70/50H01M 50/543H01M 50/528H01M 50/531H01M 10/0427H01M 50/166H01M 50/153H01M 50/109H01M 50/559Y02E60/10H01M 50/188H01M 50/181H01M 50/171H01M 50/56H01M 50/545H01M 10/0431
60
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Claims

Abstract

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode; a case that is connected to the first electrode to accommodate the electrode assembly, and includes an opening exposing the electrode assembly and a first side wall forming the opening; a cap plate that is coupled to the case to cover an outer area of the opening, and includes a through-hole exposing a central area of the opening and a second side wall overlapping the first side wall in a horizontal direction; a terminal plate that is connected to the second electrode to be insulation-bonded to the cap plate and covers the through-hole; and a first bonding layer that is positioned between the first side wall of the case and the second side wall of the cap plate, and bonds the first side wall and the second side wall.

Claims

exact text as granted — not AI-modified
1 . A rechargeable battery comprising:
 an electrode assembly including a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode;   a case that is connected to the first electrode to accommodate the electrode assembly, and includes an opening exposing the electrode assembly and a first side wall forming the opening;   a cap plate that is coupled to the case to covers an outer area of the opening, and includes a through-hole exposing a central area of the opening and a second side wall overlapping the first side wall in a horizontal direction;   a terminal plate that is connected to the second electrode to be insulation-bonded to the cap plate and covers the through-hole; and   a first bonding layer that is positioned between the first side wall of the case and the second side wall of the cap plate, and bonds the first side wall and the second side wall.   
     
     
         2 . The rechargeable battery of  claim 1 , wherein
 the second side wall covers the first side wall in the horizontal direction.   
     
     
         3 . The rechargeable battery of  claim 2 , wherein
 a length of the first side wall is longer than that of the second side wall.   
     
     
         4 . The rechargeable battery of  claim 2 , wherein
 a width in the horizontal direction of a first portion of the first side wall overlapping the second side wall in the horizontal direction is narrower than a width in the horizontal direction of a second portion of the first side wall that does not overlap the second side wall in the horizontal direction.   
     
     
         5 . The rechargeable battery of  claim 4 , wherein
 the first portion of the first side wall is in contact with the cap plate.   
     
     
         6 . The rechargeable battery of  claim 4 , wherein
 an edge of the second portion of the first side wall and an edge of the second side wall are positioned on the same vertical line.   
     
     
         7 . The rechargeable battery of  claim 1 , wherein
 the first side wall covers the second side wall in the horizontal direction.   
     
     
         8 . The rechargeable battery of  claim 7 , wherein
 a length of the second side wall is longer than that of the first side wall.   
     
     
         9 . The rechargeable battery of  claim 7 , wherein
 a width in the horizontal direction of a third portion of the second side wall overlapping the first side wall in the horizontal direction is narrower than a width in the horizontal direction of a fourth portion of the second side wall that does not overlap the first side wall in the horizontal direction.   
     
     
         10 . The rechargeable battery of  claim 9 , wherein
 the third portion of the second side wall contacts the case.   
     
     
         11 . The rechargeable battery of  claim 9 , wherein
 an edge of the fourth portion of the second side wall and an edge of the first side wall are positioned on the same vertical line.   
     
     
         12 . The rechargeable battery of  claim 1 , wherein
 the terminal plate includes   a flange portion positioned on the cap plate to cover the through-hole, and   a protrusion passing through the through-hole from the flange portion.   
     
     
         13 . The rechargeable battery of  claim 12 , further comprising
 a second bonding layer positioned between the cap plate and the flange portion and insulation-bonding the cap plate and the flange portion.   
     
     
         14 . The rechargeable battery of  claim 12 , wherein
 the electrode assembly further includes   a first electrode tab extending from the first electrode to be coupled to the case, and   a second electrode tab extending from the second electrode to be coupled to the protrusion of the terminal plate.   
     
     
         15 . The rechargeable battery of  claim 1 , wherein
 the case and the cap plate have the same polarity as the first electrode, and   the terminal plate has the same polarity as the second electrode.   
     
     
         16 . The rechargeable battery of  claim 1 , wherein
 the first bonding layer is bonded by thermal fusion.

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